Weighing apparatus.



W. P. BRAUN. WEIGBING APPARATUS. lAPPLICATION IILBD 00T. 25. 1911.

Patented Mar. 10, 1914 '1 sums-SHEET 1.

Inventor.'

W. E'. BRAUN. WBIGHING APPARATUS. APPLICATION FILED 0011.201911.

Patented Mar. 10, 1914 f zfvenor:

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7 SHEETS-SHEET 2.

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WEIGHING APPARATUS.

A PPLIOTON PILE-D 00T. 26, 1911.

Patented Mar. 10, 1914.

W. P. BRAUN. WEIGHING APPARATUS. APPLICATION FILED 00T. 25.19114 Patented MaxtlOJQM.'

7 SHEETS-SHEET 4.

Znven 71 Wf F. BRAUN. WEIGHING APPARATUS. APPLICATION FILED oq?. 25. 1911,

Pat

ented Mar. 10, 1914,

7 SHEETS-SHEET 5.

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W. F. BRAUN. WEIGHING APPARATUS. APPLIOATION m11230014 25, 1911.

Patented Mar. 10, 1914 7 SHEETS-SHEET 6.

Patented Mar. 10,1914.

7 SHEETHHEET 7.

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Brauen,

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W. E'. BRAUN. WBIGHG APPARATUS.

APPLIOATION FILED 00125, 1911.

M00 L7M *h4 7h am 2% 'VLLIAM F. BRAUN, OF BROOKLYN, NEW

VEIGHING APPARATUS.

i. ,sedere Specification of Letters Patent.

Patented E nr. it?. f.

Application filed October 25, 1911. Serial No. 656,527?.

er itis-ation.

it is the object of my invention to provide a'sca-le or weighing machine having a Vlulcrurn with the membersA thereof rolling `one upon thev other and avoiding the use of knife edges which are objectionable on account of the wear and strain to which they are subjected and the vliability of said knife edges breaking down or succumbing to the wear and pressure between the parts, and in carrying ont my invention, having the rolling' fulcrum members, I aim to provide means whereby the beam in its movement will bevccntrollei; and it will be maintained eccnrately in relation to the stationary fulcrnm member, both longitudinallyand hori- Zontally,'it being prevented from having any displacement in either direction, whatever the angular position of the beam may se in relation to the stationary i member.

in ycarrying out my. invention, I employ .one ulcrum member which is generally of eo a straight or fiat form cooperating with the other fulcrnm member which may be del scribed in general terms as being of curved form andadapted to roll upon the straight ,orilat member. More specifically stated, the fiat on straight member is provided with a series of concentric ribs or projections, while the curved membcr'is provided with a' series ofgrooves adapted to lit the projections or ribs on the lat'member so as to 4inaintain a proper relation between the beam and the main ulcrum member during the rolling action of one part on the other. The invention consists in the features and combination and arrangement of partsI hereinafter described and particularlypointout in the claims. in the accompanying drawings Figure. 1 is an elevation partly-,in section of a scale 'im and its stationary supporting frame, ...e beam beinrv in its central position assumed 'by it w enthe receiver has its full Fig. 2is` a. view similar to Fig. 1, but with the beam at its extreme angular or inclined position' in relation to the station;- ar'yhfr'am'e or fulcrum and in a state of poise wit Cllr amai-stirs of which the followin is afulcrum standard forming a part e receiver empty. Fig. 3 is a, secu-- tional view transverselv termini; the nia-- chine or transverse to the di iion or length of the beam. Fig. a is a. transverse sectional view through the center of the z ceiver and the ulcruni members associated therewith. F ig. 5 is a plan 4 Y view or half of the scale beam showing a thb receiver and v1weight and the members. Fig. 5a is a plan view oi a fnl-f crum bearing having ribs forming complete circles. Fig. 6 is a view similar to Fig. 1

of a common scale in which instead of using a series of concentric ribs on the stationary member coasting with a yseries of grooves on the beam fulcrum member, I employ a. single rib and a single groove. 7 is a' plan of the main fulcrinn on the frame similar to that shown in Fig.. 6. Fig. 8 a transverse sectional View of lthe ulcrum of Fig. 7. Fig. 9 is a view similar Yto Fig. 1, of another form of beam scale withv my iinprovements embodied therein". Fig. 10 is la plan view of the nlcrnrn members shown in Fig. 11, the

scale beam being shown in section.` Figs.` 11' and 12 are detail views of a fulcrum in wbieb'both members are curved. Figs. i3, 14, 15 and 1%3 are views of a modified form of the 'nioruni members. Referring to Figs.- 1 tr nindicates a if] .i stationary frame, there being one oi'. miese standards as shown in Fig. 3l at eachl side of the scale, and 2, indicates generally the scale beam.

This consists of two ,side arms 2", Fig. 3,

and one of which is shown in Fig. 5, fixed to a. bar 3 extending transversely between the arms. `This bar 3 extends beyond the arms and has fixed at its ends by screws 4 the ulcrum members 5 `which bear upon the fnlcrum members 6 at the upper ends Aof the standards 1.' The arms of the scale-beam are secured4 to the bar Baby the screws 7 The scale beam carries at one end a receiver 8, and at its other end a weight 9. The weight is supported from rods 1() screw threaded. at their lower ends, and passing through ears 11 on the weight, beingbeld thereto by the nuts v12 so that the wight may be beam. The upper `ends of' the rods 1G are connected with a cross bar 13, which carries a fulcrum member llli'coacting with a fulcrum member 15 on tlieiscale beam. There is a sin .ar fulcrum 15 at the othersend of zthe scalebeam which:coperates'with the adjusted inrelation to the scale pending, as shown in Figs. 1, 2, 4 and 5, between the arms of the scale beam. It will be observed that each pair of fulcrum members comprises a substantially flat or straight member, as for instance the member 6 on the frame, andl a member as 5 cooperating Itherewith having a curved surface formed'on the are of a circle, of which the center of the rod 3 is the central point. The main fulcrum has the Hat or straight fulerum on the frame and the curved member on the beam, but I do not conne myself to this construction, and I show at the fulcrum members between the beam and the receiver and the weight respectively that the lower fulcrum member may be curved and the up per fulerum member may be straight or flat. In either case there is a rolling engagement between the fulcrum members instead of as in ordinary practice, having a knife edge bearing on one member engaging the other fulcrum member.

In order to maintain the fulcrum members in proper relation in Whatever angular position they may be, I' provide a special construction consisting in forming one ful- -crum member with a series of concentric ribs and the other fulcrum member of a series of grooves to receive the ribs and maintain the proper control of the scale beam in Whatever position it may be in relation to the frame. Y'Vhere, as inthe form which yI have chosen to illustrate the principle of my invention, one fulcrum member is Hat or straight and the other fulcrum member curved, the concentric ribs will bey formed on the straight member and the grooves on the curved member will be of elliptical shape. They will be concentric though not circular. The grooves-in cross section are formed on arcs of larger radius than the radius upon which the ribs are struck. It willbe seen that in all positions of the beam the ribs and grooves will maintain the proper control and prevent displacement of the beam either longitudinally` laterally, or in any vother direction in relation to the stationary fu'lcrum member, as no matter what the -position of the beam may be the grooves and ribs Will at some point engage each other and thus maintain the proper control. The extreme angle of inclination which I have shown as the most suitable'is that shown in Fig. 2, being an angle of 30,and the distance from the main center to each outside fulcrum is such that the rolling line at the outside f-ulrum is just inline with the center from .which the circle or curve of the upper fulcrum member is struck. When the beam is in this extreme angular position the machine, provided there is no material in the receiver, is poised because of the elongation of the lever arm on the side of the'receiver and the corresponding shortening ofthe lever varm on the side of the Weight, the mass of the material being transported toward the side of the receiver. In this position of the parts, the receiver beingV empty, the scale beam at rest.

Instead of having a plurality of concentric rings and a plurality of grooves to engage the same, I may employ as in Fig. 6 a single circular groove 6 on the frame to engage a single elliptical rib 5 on the curved fulcrum member of the beam, and I may also employ a projecting straight guide, that is straight in the longitudinal direction of the beam, as at 16, to engage a groove on the opposing fulcrum member and thus prevent the beam from turning laterally or in a horizontal plane around the main center. In other Words, by this straight rib and groove the beam Will be held so as to maintain its longitudinal position in relation to the frame.

Fig. 5aL illustrates that the fulcrum members may have continuous ribs, the ribs shown being complete circles.

Referring to Figs. 9 and 12, instead of using complete circular ribs and complete ellipses on the fulerum members, I may employ a series of half rings or any part of a full circle as shown in Fig. 10 at 17, or a single half ring or other part Aof a circle may be employed, if desired, this ring or rings cooperating with a half ellipse or half ellipses or other part of a full ellipse on the other fulcrum member, 'and this formation of fulcrum may be employed either atv the main fulcrum or for ythe fulcrums between the scale beam and the receiver and Weight.

IVhen the scale is to be used for heavy Weighing, the complete rings and ellipses are preferred. If light work is to be done, the other half rings and ellipsesor other parts of the full 'circle and ellipse will answer the purpose. Neither do I limit myself to the use of the fulcrum members one of which is straight and the other curved. I may employ fulcrum members both of which are curved, as shown in Figs. 11 and 12.

My invention is applicable in any form of weighing machine or scale having a beam with fulcrum members betW-een the same and the frame, whether the machine be automatic in itsl action or of the common scale variety. p l

It will be observed from F ig 10 that the bearing may be made up of two sets of curved interengaging members and in the instance illustrated these are ofsemi-circular form on the lower member, andthe up per member will be formed elliptical or of other proper shape to correspond. It will beobserved from the above thatthe fulcrum members themselves exert control over the beam in all positions thereof, preventing it from bein displaced in any direction. As

also state the curved interengaging ribs and grooves maintain control of the beam in ribs seeking a bearing along the line of the low part of the groove.

The beam is poised Wheni in the position -hovvn in Fig. i). this being due to the length nl' the arm on the receiver side oi' the beam lmol also to the shape ofthe beam which presents the preponderance of nmlerial at the proper point to secure the poise at the beam when in the position sho'ivn in Fig. 2 at an angle ot 30D. lith the receiver empty at the angularposition indicated. the. beam 'will begin to move as soon as the irst particle, of the material enters the receiver.

The scale shown in Fig. G is of the common scale beam form having a single arm lever and the straight rib 'is therefore necessary in order to prevent this arm or beam from turning in a horizontal plm e or n erally. I may employ a series of t iese straight ribs.

In Figs 13, l-i" and 15 form of fulcrum in )vhich one or the members, namely, the member 19 on the beam, is provided With aplain curved bearing face 20 rolling on a series of ribsell on the tulcrum member 22 ot the trame. These ribs extend parallel. with each other and parallel with the direction of movement of the beam, and they afford bearing edges or lines npon which the plain face of the beam fulcrum rolls. This form of l'ulcrum as in the forms above described is controlled against displacement in any direction by curved interehangii members consisting ot' the ribs 23 on the rame member and curved in a ierizontal plane and engaging grooves Q-.t in the beam ulcrnm member, which grooves like t'hose above described are ot' elliptical shape, though it is not necessary that they form complete ellipses. As shown in Fig. 13, the fulcrum member may be cut otll along the line :is the extent of the interengaging members there shown in full lines is sutH- cient to maintain the engagement between the parts in the. eXtreme inclination which the beam is capable of assuming. The line 263-26 represents the limit ot movement corresponding to a chosen angle',l of '300, itbeing understood that' this angle may be varied. Itivvill be observed that in, this form the Weight of the beam yvvit'h all its parts connected therewith and snpporte'd'thereby is taken by, the longitudinal extending ribs l show a noth er 2l, and also by the interengaging;l curved,

members 2B, Q-i, and in all of the forms of fulcrum above described as vvell. as the form noiv being described, the curved ulcrum member presents a bearing face correspondin Lr to the segmentof a cylinder.

lVhere vvith the form of fulcrnm shown in Figs. 13, 15, only a single arm or beam is employed, I use the straight i'nterengaging members, these being illustrated in Fig. 16,

l positions thereof and they operate at ally l Where a rib 27 on the frame member engages -mes on deiimte lines, the high parts ot the i a groove on the beam member, said rib extending in the direction of movement, or in the longitudinal plane of the beam. This rib may be arranged at the central line ot the beam and have upon each title thereof the ribs 21 above mentioned.

I may place either the ribs or he grooves on the curved member and form the o her member to correspond.

l claim as my invention:

l. ln a Weighing machine, the combination ot a supporting trame air'l a t' fain with non -conoentricl fulcrnm l'nelnbers between the same, one of which is curved to roll upon the other, one of said members having a curved rib and the other ot said members having a curved groove to engage the curved rib and control the relation ot' the beam both laterally and longitudinally in all angular positions of the beam, the curve ot said groove and rib being each in a horizontal plane when the beam is horizontal a nd lil in a. direction transversely of the ulcrum v members, substantially as described.

Q. ln combination in a Weighing machine or scale, the mainframe, the scale b 1am, and non-concentric fulcrum members between, one of which is curved to roll on the other, one member having a rib ustruck on the arc ot a circle and the other member having an elliptical groove, the curve of said groove and rib being each in a lnn'izontal plane when the beam is horizontal and in a direction transversely of the fnlcrmn niembers, substantially as descrii'ied.

3. In combina-tion with the main trame fixlcrum, the beam fulcrum. said Atnlcrnmc-f being non-concentric and having interengaging portions curved in a direction transversely of the tulcrnm members and one tulcram member 'having rolling contact with the other and a projecting straight guide to prevent the scale beam from turning horizontally in relation to the frame, one of said curved interengaging portions lying in a horizontal plane, substantially as described.

'4. In combination, in a scale beam` the non-concentric nlcrum members having interengaging paiits and one being curved to roll on the other, one of said members having its said parts'of elliptical Jform curving' laterally of the member, the corresponding parts of the other memberlying` in a honizontal plane, substantially as described.

In combination in a weighing apparatus, the fulcrum members one of which has a plain. curvedbearing surface and the other a series of ribs extending parallel with each other. and with the direction ot' movement 125 of the beam, said plain curvedbearing surface bein supported by the lines provided by the series of ribs and controlling means consisting of the interengaging members on the fulcrum members, said members being curved transversely of the fulcrum members l and one set of said members lying in a hori.- l zolital plane, substantially as described. l 6. In combination in a weighing apparatus, the fulcrum members one of which i has a plain curved bearing surface and the other a series of ribs extending parallel with each other and with the'direction of movenient of the beam, said plain curved bearing surface being supported by the ylines provided by the -series of ribs and controlling l means consisting of the interengaging parts l on the fulcrum members, 'jmd parts being; curved transversely of the fulcrum membenl and one member having a straight rib and the other member having n straight groeve engaged by said rib, substantially as def scribed.

In testimony whereof, I alix my signuture in presence of two witnesses.

lVILLIAM F. BEAUX. Titnesses VALTER DONALDSON, CHARLES E. PARSONS. 

